A packaging carton production line

Abstract

This invention relates to the field of carton production and conveying technology, specifically to a packaging carton production line. In this application, the rollers used for conveying the carton include an outer rotating drum with multiple telescopic strips evenly distributed around its circumference. These telescopic strips are arranged in a ring and can extend or retract into the inner cavity of the outer rotating drum. Both ends of the outer rotating drum are rotatably mounted on an inner shaft. Permanent magnets are provided at the inner ends of the telescopic strips, and electromagnetic coils are provided at the upper outer ends of the inner shaft corresponding to the telescopic strips. The electromagnetic coils are used to align and cooperate with the permanent magnets of the telescopic strips, driving the telescopic strips to extend or retract into the outer rotating drum. During the carton conveying process, when the carton reaches the processing station, the extension of the telescopic strips located on both sides of the carton can limit its movement, thereby improving its stability.

Description

Technical Field

[0001] This invention relates to the field of cardboard box production and conveying technology, and specifically to a packaging cardboard box production line. Background Technology

[0002] In the traditional carton conveying process, ordinary roller conveyor belts have been widely used. These traditional roller conveyor belts are typically composed of smooth-surfaced and structurally simple rollers, which have revealed many drawbacks during carton conveying. On the one hand, the friction between the rollers and the carton is relatively small. Under high-speed conveying conditions, the carton is prone to sliding and shifting on the rollers due to inertia, making it difficult to accurately travel along the predetermined route to each processing station. This greatly increases the risk of quality problems for subsequent processing steps such as printing and slotting, which require high positional accuracy. Issues such as misaligned printed patterns and deviations in slotting positions are common.

[0003] On the other hand, due to the lack of effective carton positioning methods, when a carton arrives at a specific processing station, it cannot quickly and stably remain stationary for processing. Additional manual intervention or simple mechanical fixing devices are often required for positioning. This not only wastes manpower and slows down production, but also introduces human error due to operational instability, further affecting product quality. Moreover, simple mechanical fixing devices often use rigid contact methods, frequently colliding and rubbing against the carton, easily scratching the carton surface and damaging its appearance, significantly reducing the aesthetic appeal of the product packaging and failing to meet the current market demand for high-quality packaging.

[0004] In conclusion, there is an urgent need for a packaging carton production line that can achieve efficient and stable carton transport, precise positioning during processing, and protection of the carton surface while adapting to the needs of different production processes. This would overcome the various shortcomings of existing technologies and improve the production efficiency and quality of packaging cartons. Summary of the Invention

[0005] To achieve the above objectives, this application discloses a packaging carton production line, which includes a conveyor line comprising a plurality of rollers for conveying cartons.

[0006] The processing station is located at the conveyor line;

[0007] The roller includes:

[0008] The outer rotating cylinder has multiple telescopic strips evenly distributed around its circumference. The multiple telescopic strips are arranged in a ring and can extend or retract into the inner cavity of the outer rotating cylinder.

[0009] The inner shaft, on which the two ends of the outer rotating cylinder are rotatably sleeved;

[0010] The inner end of the telescopic bar is provided with a permanent magnet, and the upper outer end of the inner shaft is provided with an electromagnetic coil corresponding to the telescopic bar. The electromagnetic coil is used to align and cooperate with the permanent magnet of the telescopic bar to drive the telescopic bar to extend or retract into the outer rotating cylinder.

[0011] In the specific design, multiple electromagnetic coils are evenly distributed on the outer side of the inner shaft. These electromagnetic coils are arranged in a ring and are used to align and cooperate with the telescopic strips on the outer rotating cylinder.

[0012] An elastic band connects two adjacent telescopic strips, with both ends of the elastic band extending to the ends of the telescopic strips, and the outer side of the end of the elastic band being flush with the outer side of the telescopic strip.

[0013] The cross-section of the elastic band has a wavy structure, thereby forming multiple protrusions and depressions on the surface of the elastic band, and the outer side of the protrusions is strip-shaped, which is perpendicular to the telescopic strip.

[0014] In addition, a fan blade is provided at one end of the outer rotating cylinder, the inner shaft passes through the center of the fan blade, and an air outlet is provided at the other end of the outer rotating cylinder. During operation, the outer rotating cylinder rotates around the inner shaft under the action of the drive mechanism.

[0015] The outer ends of the telescopic strip are respectively provided with guide slopes that gradually extend from top to bottom.

[0016] Positioning frames are respectively provided on both sides of the conveyor line along its conveying direction. Rollers are rotatably mounted on the positioning frames, and a conveying space is formed between the rollers of the two positioning frames to allow the carton to pass through.

[0017] The positioning frame is equipped with multiple rollers arranged at intervals along the conveying direction of the conveyor line.

[0018] In one possible implementation, the packaging carton production line further includes a first conveyor line and a second conveyor line that are connected to each other. Both the first and second conveyor lines are composed of multiple rollers forming a conveying structure. At the connection point, the extension height of the telescopic bar of the first conveyor line roller is greater than the extension height of the telescopic bar of the second conveyor line roller.

[0019] The solution of this application includes an outer rotating drum for conveying cartons, which has multiple telescopic strips evenly distributed around its circumference. These telescopic strips are arranged in a ring and can extend or retract into the inner cavity of the outer rotating drum. Both ends of the outer rotating drum are rotatably fitted onto an inner shaft. Permanent magnets are provided at the inner ends of the telescopic strips, and electromagnetic coils are provided at the upper outer ends of the inner shaft corresponding to the telescopic strips. The electromagnetic coils are used to align and cooperate with the permanent magnets of the telescopic strips, driving the telescopic strips to extend or retract into the outer rotating drum. During the carton conveying process, when the carton reaches the processing station, the extension of the telescopic strips located on both sides of the carton can limit its movement, thereby improving its stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the packaging carton production line in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the overall structure of the roller in the embodiments of this application;

[0022] Figure 3 This is a partial structural diagram of the roller in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the internal structure of the roller in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram showing the position of the permanent magnet in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram illustrating the roller's positioning of the carton in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram showing the positions of the roller and the positioning frame in an embodiment of this application;

[0027] Figure 8 This is a cross-sectional view of the elastic band in an embodiment of this application. Detailed Implementation

[0028] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. The principles and features of this invention are described below with reference to the accompanying drawings. The examples given are only for explaining this invention and are not intended to limit the scope of this invention.

[0029] The term "comprising" and other similar expressions used in the specification, claims, and accompanying drawings of this invention are intended to cover a non-exclusive inclusion, such as a process, method, system, or apparatus that includes a series of steps or units but is not limited to the steps or units listed.

[0030] Example 1: As Figure 1-7 As shown, a packaging carton production line includes: a conveyor line 100, which includes a plurality of rollers 300 for conveying cartons;

[0031] Processing stations 200 are set at the conveyor line 100; according to different processing requirements in the carton production process, such as printing, slotting, labeling and other processes, processing stations 200 are reasonably arranged along the conveyor line 100.

[0032] like Figure 2-5 As shown, the roller 300 includes:

[0033] The outer rotating cylinder 1 has multiple telescopic strips 2 evenly distributed around its circumference. These telescopic strips 2 are arranged in a ring and can extend or retract into the inner cavity of the outer rotating cylinder 1. The telescopic strips 2 are embedded into the cylinder wall of the outer rotating cylinder 1 through slots, the size of which matches the shape of the telescopic strip 2. Furthermore, the outer surface of the telescopic strip 2 can be coated with a layer of soft material such as rubber or polyurethane, which increases the friction with the cardboard box, preventing the box from sliding during processing and avoiding scratches on the box surface.

[0034] Inner shaft 3, the two ends of the outer rotating cylinder 1 are rotatably sleeved on the inner shaft 3;

[0035] A permanent magnet 4 is provided at the inner end of the telescopic strip 2, and an electromagnetic coil 5 is provided at the upper outer end of the inner shaft 3 corresponding to the telescopic strip 2. The electromagnetic coil 5 is used to align and cooperate with the permanent magnet 4 of the telescopic strip 2 to drive the telescopic strip 2 to extend or retract into the outer rotating drum 1. During the carton conveying process, when the carton reaches the processing station 200, the telescopic strips 2 located on both sides of the carton are driven to extend, thereby limiting the carton and improving its stability.

[0036] In the specific design, a permanent magnet 4 is fixedly installed at the inner end of the telescopic bar 2. The permanent magnet 4 can be made of neodymium iron boron material with a high magnetic energy product to ensure that it can generate a sufficiently strong magnetic field to interact with the electromagnetic coil 5. The electromagnetic coil 5 is tightly wound around the upper outer end of the inner shaft 3 at the position corresponding to the telescopic bar 2. The control system of the conveyor line 100 integrates a module for controlling the current of the electromagnetic coil 5, such as... Figure 6 As shown, when the carton arrives at processing station 200, a position sensor (such as a photoelectric sensor) installed on the conveyor line 100 detects the carton's position signal and transmits it to the control system. The control system then supplies corresponding current to the electromagnetic coils 5 located on both sides of the carton according to a preset program. When a positive current is supplied, the magnetic field generated by the electromagnetic coil 5 attracts the permanent magnet 4, driving the telescopic bar 2 to extend out of the outer rotating cylinder 1 until it reaches the preset extension length. This extension length can be adjusted according to the carton's height, weight, and processing requirements. When processing is complete and the carton needs to continue conveying, the control system supplies a reverse current to the electromagnetic coil 5, causing the magnetic field generated by the electromagnetic coil 5 to repel the permanent magnet 4. The telescopic bar 2 retracts into the inner cavity of the outer rotating cylinder 1, allowing the carton to smoothly pass through processing station 200 and enter the next process.

[0037] When the carton reaches the first processing station 200, the position sensor promptly detects the carton's arrival information and sends a signal back to the control system. The control system quickly controls the corresponding electromagnetic coil 5 to extend the telescopic bar 2, precisely limiting the carton and ensuring it remains stably in the processing position. At this time, the equipment at processing station 200 starts operating, such as the printing head of the printing press descending and the slotting machine's cutters engaging, processing the carton according to predetermined process parameters. During processing, the control system monitors the operating status of the processing equipment and the positional stability of the carton in real time.

[0038] In one possible implementation, multiple electromagnetic coils 5 are evenly distributed on the outer side of the inner shaft 3. These coils are arranged in a ring and are used to align with the telescopic strips 2 on the outer rotating drum 1. The extension of the multiple telescopic strips 2 can be controlled synchronously, achieving a similar effect to adjusting the diameter of the roller 300. At the carton processing station 200, such as during printing or slotting operations, different processing techniques may have specific requirements for the height and position of the carton. Adjusting the diameter of the roller 300 allows the carton to be at a more ideal height and position during processing. During carton conveying, if the diameter of the roller 300 needs adjustment, a precisely controlled current is supplied to the corresponding electromagnetic coil 5, causing the telescopic strips 2 to extend synchronously. Since the multiple telescopic strips 2 are evenly distributed on the outer rotating drum 1, their synchronous extension or retraction can effectively change the effective outer diameter of the outer rotating drum 1, similar to continuously adjustable roller 300 diameter.

[0039] In one possible implementation, the extension status of the telescopic strip 2 is monitored in real time using a PLC control system. The telescopic strip 2 is ensured to reach the predetermined extension length by using a feedback sensor built into the electromagnetic coil 5 (such as a Hall sensor, which is used to detect changes in magnetic field strength to indirectly reflect the position of the telescopic strip 2) or by using a displacement sensor installed on the outer rotating drum 1. This enables precise adjustment of the diameter of the roller 300 to adapt to the conveying and processing needs of different cartons.

[0040] The outer ends of the telescopic strip 2 are respectively provided with guide slopes 11 that gradually extend from top to bottom. When the carton reaches the processing station 200 and the telescopic strip 2 extends to limit the carton, due to possible deviations in the initial placement position, the side of the carton can slide downward along the guide slopes 11 when the telescopic strip 2 extends, so as to play a guiding role.

[0041] Example 2: Figure 3-5 As shown, an elastic band 6 connects two adjacent telescopic strips 2. The two ends of the elastic band 6 extend to the ends of the telescopic strips 2, and the outer side of the end of the elastic band 6 is flush with the outer side of the telescopic strip 2.

[0042] The elastic band 6 should preferably be made of rubber or polyurethane. For specific connections, one feasible method is to pre-cut dovetail or T-grooves on the telescopic strip 2, machine the two ends of the elastic band 6 to match these shapes, embed them into the grooves, and then secure them using strong adhesive or a vulcanization process to ensure the elastic band 6 will not loosen during long-term use. Another method is to use rivets or bolts to fix the two ends of the elastic band 6 to the telescopic strip 2. However, with this method, care must be taken to avoid exposing the rivet or bolt heads to prevent scratching the cardboard box. This problem can be solved by covering the connection area with a thin rubber pad.

[0043] When the carton reaches processing station 200 and the telescopic strip 2 extends to limit its movement, the elastic band 6 further enhances the carton's stability. On one hand, the elastic band 6 can compensate for any slight differences in the extension length of the telescopic strip 2, providing more even support to the sides of the carton. On the other hand, when external forces are applied to the carton during processing, such as vibrations from printing equipment or the cutting of slotting tools, the elastic band 6 can absorb some of the impact force, preventing the carton from shifting or deforming due to uneven instantaneous force, thus ensuring processing accuracy.

[0044] like Figure 8 As shown, the cross-section of the elastic band 6 has a wavy structure, thereby forming multiple protrusions 7 and recesses 8 on the surface of the elastic band 6, and the outer side of the protrusions 7 is strip-shaped, which is perpendicular to the telescopic strip 2.

[0045] When the carton comes into contact with the elastic band 6, the protrusion 7 located on the ground of the carton can be pressed down by it, which can increase the friction between the two. The protrusion 7 located on the side of the carton can prevent the carton from displacing in that direction due to factors such as vibration of the processing equipment and external impact.

[0046] Example 3: As Figure 2-3 As shown, one end of the outer rotating cylinder 1 is provided with a fan blade 9, the inner shaft 3 passes through the center of the fan blade 9, and the other end of the outer rotating cylinder 1 is provided with an air outlet 10. During operation, the outer rotating cylinder 1 rotates around the inner shaft 3 under the action of the drive mechanism.

[0047] In the specific design, the fan blade 9 is connected to one end of the outer rotating cylinder 1 via a central hub structure. The hub is designed as a sleeve with internal threads, and its inner diameter matches the outer diameter of the inner shaft 3 to ensure that the outer rotating cylinder 1 can rotate smoothly around the inner shaft 3. The shape of the air outlet 10 can be circular, rectangular, or elliptical, selected according to the layout of the surrounding equipment on the production line and the required ventilation direction. The drive mechanism that drives the outer rotating cylinder 1 to rotate around the inner shaft 3 can take various forms, commonly including motor drive, belt drive, and gear drive.

[0048] When the drive mechanism (such as a motor) is working, the outer rotating cylinder 1 rotates around the inner shaft 3 under the action of the driving force. As the outer rotating cylinder 1 rotates, the fan blades 9 draw in air and push it towards the air outlet 10. The airflow carries away the heat generated by the electromagnetic coil 5 on the inner shaft 3, thus achieving heat dissipation. The heat generated by the electromagnetic coil 5 on the inner shaft 3 is quickly dissipated, reducing the coil temperature and improving the working efficiency and stability of the electromagnetic coil.

[0049] Example 4: Figure 7 As shown, positioning frames 12 are respectively arranged on both sides of the conveyor line 100 along its conveying direction. Rollers 300 are rotatably mounted on the positioning frames 12, forming a conveying space between the rollers 300 of the two positioning frames 12 to allow cartons to pass through. After the conveyor line 100 is started, if a carton is placed on the conveyor line 100, the item is conveyed between the rollers 300 as the conveyor line 100 moves. The rollers 300 rotate, assisting the conveyor line 100 in pushing the item forward while maintaining the stability of the item during conveying. The rollers 300 on the positioning frames 12 ensure that the item does not deviate from the predetermined path during conveying, maintaining the linear movement of the item.

[0050] Furthermore, multiple rollers 300 arranged at intervals are mounted on the positioning frame 12 along the conveying direction of the conveyor line 100. When positioning the carton, the diameter of the rollers 300 can be adjusted sequentially along the length of the positioning frame 12, so that the outer edges of the rollers 300 of two positioning frames 12 form a V-shaped structure. The V-shaped structure formed by the rollers 300 guides the carton to move along the centerline of the conveyor line 100, maintaining the carton's directionality during conveying. This reduces the carton's offset and twisting during conveying, ensuring the carton passes smoothly through the conveyor line 100. Additionally, by adjusting the diameter of the rollers 300, the opening size of the V-shaped structure can be changed to accommodate cartons of different widths.

[0051] Example 5: Figure 1 As shown, in one possible implementation, the packaging carton production line also includes a first conveyor line 13 and a second conveyor line 14 that are connected to each other. Both the first conveyor line 13 and the second conveyor line 14 are composed of multiple rollers 300 forming a conveying structure. At the connection point, the extension height of the telescopic bar 2 of the roller 300 of the first conveyor line 13 is greater than the extension height of the telescopic bar 2 of the roller 300 of the second conveyor line 14.

[0052] The extension bar 2 of the roller 300 of the first conveyor line 13 extends to a greater height than that of the second conveyor line 14, forming a sloped transition that helps the carton to be smoothly transferred from the high conveyor line to the low conveyor line.

[0053] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A production line for packaging cartons, characterized in that, include: A conveyor line, the conveyor line comprising multiple rollers for conveying cartons; The processing station is located at the conveyor line; The roller includes: The outer rotating cylinder (1) has multiple telescopic strips (2) evenly distributed around its circumference. The multiple telescopic strips (2) are arranged in a ring and can extend or retract into the inner cavity of the outer rotating cylinder (1). The inner shaft (3) has both ends of the outer rotating cylinder (1) rotatably mounted on the inner shaft (3); The inner end of the telescopic bar (2) is provided with a permanent magnet (4), and the upper outer end of the inner shaft (3) is provided with an electromagnetic coil (5) corresponding to the telescopic bar (2). The electromagnetic coil (5) is used to align and cooperate with the permanent magnet (4) of the telescopic bar (2) to drive the telescopic bar (2) to extend or retract into the outer rotating cylinder (1). During the conveying of the carton, when the carton reaches the processing station, the telescopic bars (2) located on both sides of the carton are driven to extend to limit the carton and improve its stability. When the processing is completed and the carton needs to continue to be conveyed, the control system sends a reverse current to the electromagnetic coil (5) so that the magnetic field generated by the electromagnetic coil (5) repels the permanent magnet (4), and the telescopic bar (2) retracts into the inner cavity of the outer rotating cylinder (1), thereby ensuring that the carton can pass through the processing station smoothly and enter the next process. An elastic band (6) is connected between two adjacent telescopic strips (2). The two ends of the elastic band (6) extend to the ends of the telescopic strips (2), and the outer side of the end of the elastic band (6) is flush with the outer side of the telescopic strips (2). The cross section of the elastic band (6) is wavy, thereby forming a plurality of protrusions (7) and recesses (8) on the surface of the elastic band (6), and the outer side of the protrusions (7) is strip-shaped and is perpendicular to the telescopic strip (2).

2. The packaging carton production line according to claim 1, characterized in that: Multiple electromagnetic coils (5) are evenly distributed on the outer side of the inner shaft (3). The multiple electromagnetic coils (5) are arranged in a ring and are used to align and cooperate with the telescopic strip (2) on the outer rotating cylinder (1).

3. The packaging carton production line according to claim 1, characterized in that: One end of the outer rotating cylinder (1) is provided with a fan blade (9), the inner shaft (3) passes through the center of the fan blade (9), and the other end of the outer rotating cylinder (1) is provided with an air outlet (10). During operation, the outer rotating cylinder (1) rotates around the inner shaft (3) under the action of the drive mechanism.

4. The packaging carton production line according to claim 1, characterized in that: The telescopic strip (2) has guide slopes (11) that gradually extend from top to bottom on both sides of its outer end.

5. The packaging carton production line according to claim 1, characterized in that: Positioning frames (12) are respectively provided on both sides of the conveying line along its conveying direction. Rollers are rotatably installed on the positioning frames (12), and a conveying space is formed between the rollers of the two positioning frames (12) to allow the carton to pass through.

6. The packaging carton production line according to claim 5, characterized in that: The positioning frame (12) is equipped with multiple rollers arranged at intervals along the conveying direction of the conveying line.

7. The packaging carton production line according to claim 1, characterized in that: It also includes a first conveyor line (13) and a second conveyor line (14) that are connected to each other. Both the first conveyor line (13) and the second conveyor line (14) are composed of multiple rollers forming a conveying structure. At the connection point, the extension bar (2) of the roller of the first conveyor line (13) extends to a greater height than the extension bar (2) of the roller of the second conveyor line (14).

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